Measuring instrument



April 2,1929. M. D. VIETA I 1,707,586

MEASURING INSTRUMENT Filed Oct. 12, 192-1 v Attorng Patented Apr. 2,1929. f

I -1,707,586 PATE NrIoFFICE;

1 "-"MIGUEL n. vrnrn, or I-IABANA, CUBA,

MEASURING INSTRUMENT;

Application filed October 12 1-27, Seriel No; 225,828, @Ildin cubaJune its, 1927.

.The present'invention-relates to improve: ments in measuring lnstruments and has ref-;

erence more particularly to an improved folding rule.

. One of the important objects of the present invention is toprovide a measuring instru- V ment of the above mentioned character which includes a series of hingedly connected sections, the same being adapted for arrangement in various positions whereby to form a straight edge or a triangle.

Another important object of the invention is to provide a measuring instrument of the above mentioned character which facilitates the checkin of 30, 45, and 90 degree angles, thus obviating the necessity of having to provide individual triangles of various de grees. 3

A still'further object is to provide a measuring instrument of the above mentioned character which is simple in construction, inexpensive, strong and durable and further well adapted to the purpose for which it is .designed. Y

Other objects and advantages of the invention will become apparent from the follow-- ing description when taken in connection with the accompanying drawings. In the accompanying drawing forming part of this application and in which like numerals indicate like parts throughout the same;

Figure 1 is a top plan view of the measuring instrument showing the same in theformation of a-right angle triangle. Figure 2 is an edge elevation'thereof.

Figure 3 is a top pl-anview showing the instrument inits folded condition. 'Figure 4 is a side elevation thereof, and Figure 5 is a fragmentary detail section showing the connection between the free ends of the rule. j I

1 In the drawing wherein for the purpose of illustration is shown the preferred embodiment of my invention, the numeral, 1 designates generally my improved measuring instrument, the same comprising twelve short sections of the'same size from connection to connection, designated by the numeral 2.

hese sections are pivotally connected together at their adjacent ends in any appropri-'.

of the sections are disposed v in an extended straight line, the instrument will measure one meter-and twenty centimeters,

Each section will of course be provided with the usual indicia to facilitate the proper use of the instrument.

. One end section 3 of the rule is forme with a laterally extending ear 4 and arranged on this ear is the upstanding headed pin 5,

the purpose of which will be' presently apparent.

The other end section 6 is also formed with a laterally extendingem 7 andthis ear is formed. with an opening 8 in which the headed pin 5' is adapted to be snapped for connectingthe end sections of the rule to A gether in the manner shown in Figures and 5. y I V v A scratch line 9 is arranged on the upper 'face of the 'endmost section 3 in such a manner as to permit theend of'the other endsection 6 to be disposed in the same horizontal plane with said scratch line whereby, to indicate that the arm portion B formed by three of the sections of the respect to the base A. The hypothenuse C cooperates with the opposite ends of the base V A and the perpendicular arm B to form a right angle triangle in the proportion of 3,

4 and 5, thus assuring its exactness as it complies with the well known theorem of Pythagoras.

v The. lines which carry the marks forshow- 7 ing theway ofchecking angles of 30' and 60 degrees the oneE, andthe other D, for the,

' instrument.v

.In this manner the folding rule can be i used either as a right angle triangle, or by following the linesfdescribed therein for checking angles of 30,4501 60 degrees as is desired. a

The instrument can furthermore be used as a meter rule When allof the sections are extended and disposed in the same horizontal plane.

When not inuse, theheaded pin5 is disengaged'from the opening 8 and the sections 2 are foldedupon themselves in the manner asshown in Figures 3 and 4 by providing a 80 folding rule is disposed at right angles with compact device which can be easily carried or readily stored away without occupying any considerable space.

While I have shown the preferred embodiment of my invention, it is to be understood that various changes in the size, shape and arrangements of parts may be resorted to without departing from the spirit of the invention and thescopc of the appended claim.

Having thus described the invention, what I claim as new is In a measuring instrument of the class de- 7 scribed, a folding rule including twelve sections of the same size, said sections being hingedly connected together in overlapping relation at their adjacent ends, a laterally extending ear formed on each end section adjacent the free end thereof, one of said ears beingformed with a socket, and a headed pin carried by the other ear for engagement with the socket to secure the rule sections in a predetermined triangle forming MIGUEL D. VIETA. 

